Investigation of Laser Material Potential in Lead Tungsten Tellurite Glasses

Lead tungsten tellurite (LTT) glasses, incorporating varying concentrations of Dy3+ions, were synthesized and subjected to comprehensive characterization encompassing optical absorption, photoluminescence, and decay measurements. X-ray diffraction (XRD) analysis affirmed the amorphous nature of the LTT host. Employing the Judd–Ofelt (J–O) theory, three phenomenological intensity parameters Ωλ(λ = 2, 4, 6) were derived from absorption spectral intensities. The heightened sensitivity of the 6H15/2→6F11/2 transition, determined by the magnitude of the Ω2 parameter, was explored. Radiative properties, including spontaneous transition probabilities (AR), fluorescence branching ratios (βR), and radiative lifetimes (τR), were determined using the J–O intensity parameters. The impact of Dy3+ion concen-tration on the emission intensities of 4F9/2→6HJﹶ (Jﹶ = 15/2, 13/2, 11/2, and 9/2) transitions was also investigated and reported.